actuator selection

[wangp1283]

Hi, I'm new to actuators. but I have an application now that requires
one.

The maximum thrust of the actuator needed is 5000 lb. Most of
the time, it doesn't have to move, but rather just "hold" a 5000lb
load. The maximum stroke needed is 4 cm. The maximum velocity needed
is 0.1 m/s.

Can anyone tell me which manufacture has such a product, and
generally, how costly are such devices (if mass produced).

Also nice to know the power consumption. Is the correct way to figure out power consumtion simply the thrust multiplied by maximum velocity? Does it require this much power all the time or depends on load?

Also nice to know the weight, lighter is strongly preferred. Don't know if it's possible to keep it under 50lb.



Thanks.

 

[mc5w]

Sounds to me like what you need is a hydraulic servo system - essentially similar to power steering in cars but optimized to greater force and less travel.

For what you are doing you might be able to extract the hydraulic control valve from a power steering unit and use it to drive a hydraulic cylinder.

Mike Cole

 

[ScottyUK]

Or possibly a ballscrew actuator with a servo motor driving it. That solution is probably lighter than hydraulics if you factor in the weight of the hydraulic pump and oil reservoir.

There are some interesting self-contained hydraulic actuators which just require power to them. I think REXA (not Rexroth) are one manufacturer. They are fairly expensive.



----------------------------------

If we learn from our mistakes,
I'm getting a great education!